Synthesis and optophysical properties of blue-emitting iridium (Ⅲ) complex bearing oxadiazole-based picolinic acid derivative  

作　　者：文忠林 胡峥勇 刘煜 肖方亮 马小云 朱美香 朱卫国 

机构地区：[1]College of Chemistry,Xiangtan University [2]Key Laboratory of Environment-Friendly Chemistry and Application,Ministry of Education,Xiangtan University

出　　处：《Journal of Central South University》2009年第3期380-384,共5页中南大学学报（英文版）

基　　金：Projects(20772101,50473046) supported by the National Natural Science Foundation of China;Project(2007FJ3017) supported by the Hunan Provincial Science Foundation, China;Project(07C764) supported by the Science Foundation of the Education Department of Hunan Province,China

摘　　要：An iridium （Ⅲ） bis[（4,6-difluorophenyl）pyridinato-N, C^2][6-（6＇-（4＂-（ 5＂-phenyl- 1＂, 3＂, 4＂-oxadiazole-2＂-yl） phenoxy） hexyloxy picolinate） was synthesized and characterized by IH NMR and elementary analysis in order to study the effect of ancillary ligand of the oxadiazole-based picolinic acid derivative on optophysical properties of its iridium complex, and further to obtain an iridium complex with highly-efficient blue emission. The thermal stability, UV absorption and photoluminescent properties of this iridium complex were investigated. Compared with iridium （Ⅲ） bis[（4,6-difluorophenyl）pyridinato-N, C^2]（picolinate） reported as a highly-efficient blue electroluminescent material, this iridium complex bearing an oxadiazole-based picolinic acid derivative presents higher thermal stability, more intense UV absorption at 291 nm and similar photoluminescent spectrum peaked at 469 nm. This indicates that tuning ancillary ligand of picolinic acid with an oxadiazole unit can improve the optophysical properties of its iridium complex.An iridium (Ⅲ) bis[(4,6-difluorophenyl)pyridinato-N, C2][6-(6'-(4''-( 5'''-phenyl- 1''',3''',4'''-oxadiazole- 2 '''-yl) phenoxy) hexyloxy picolinate) was synthesized and characterized by 1H NMR and elementary analysis in order to study the effect of ancillary ligand of the oxadiazole-based picolinic acid derivative on optophysical properties of its iridium complex, and further to obtain an iridium complex with highly-efficient blue emission. The thermal stability, UV absorption and photoluminescent properties of this iridium complex were investigated. Compared with iridium (Ⅲ) bis[(4,6-difluorophenyl)pyridinato-N, C2](picolinate) reported as a highly-efficient blue electroluminescent material, this iridium complex bearing an oxadiazole-based picolinic acid derivative presents higher thermal stability, more intense UV absorption at 291 nm and similar photoluminescent spectrum peaked at 469 nm. This indicates that tuning ancillary ligand of picolinic acid with an oxadiazole unit can improve the optophysical properties of its iridium complex.

关 键 词：iridium complex 1  3  4-oxadiazole SYNTHESIS optophysical properties 

分 类 号：O621.3[理学—有机化学]